Adding flip clock scss file and pre-rendered version.

The scss file extends the default flipclock.css file to use compass and the bourbon mixing to fill the gaps that the prefix-free js file was filling.

Signed-off-by: marblegravy <marblegravy@113092.no-reply.drupal.org>
Added a demo file to  provide a base for new users to work from.

Signed-off-by: marblegravy <marblegravy@113092.no-reply.drupal.org>